Added workhorse tests (incomplete).

Author: ionelmc

celery/tests/concurrency/test_workhorse.py

@@ -0,0 +1,100 @@
+from __future__ import absolute_import
+
+import errno
+import socket
+import time
+import os
+
+from itertools import cycle
+
+from celery.five import items, range
+from celery.utils.functional import noop
+from celery.tests.case import AppCase, Mock, SkipTest, call, patch
+from celery.concurrency.workhorse import TaskPool
+
+from kombu.async.semaphore import LaxBoundedSemaphore
+
+class test_Workhorse(AppCase):
+
+    def setup(self):
+        if not hasattr(os, 'fork'):
+            raise SkipTest('missing os.fork')
+
+    def test_run_stop_pool(self):
+        pool = TaskPool(semaphore=LaxBoundedSemaphore(10))
+        pool.start()
+        pids = []
+        accept_callback = lambda pid, ts: pids.append(pid)
+        success_callback = Mock()
+        error_callback = Mock()
+        pool.apply_async(
+            lambda x: x,
+            (2, ),
+            {},
+            accept_callback=accept_callback,
+            correlation_id='asdf-1234',
+            error_callback=error_callback,
+            callback=success_callback,
+        )
+        self.assertTrue(pool.workers)
+        self.assertEqual(pids, list(pool.workers))
+        pool.stop()
+        success_callback.assert_called_with(None)
+        self.assertFalse(error_callback.called)
+
+    def test_terminate_pool(self):
+        pool = TaskPool(semaphore=LaxBoundedSemaphore(10))
+        pool.start()
+        pids = []
+        accept_callback = lambda pid, ts: pids.append(pid)
+        success_callback = Mock()
+        error_callback = Mock()
+        pool.apply_async(
+            lambda x: time.sleep(x),
+            (2, ),
+            {},
+            accept_callback=accept_callback,
+            correlation_id='asdf-1234',
+            error_callback=error_callback,
+            callback=success_callback,
+        )
+        self.assertTrue(pool.workers)
+        self.assertEqual(pids, list(pool.workers))
+        pool.terminate()
+        self.assertFalse(success_callback.called)
+        self.assertTrue(error_callback.called)
+
+
+    def test_grow_pool(self):
+        semaphore = LaxBoundedSemaphore(1)
+        pool = TaskPool(semaphore=semaphore)
+        pool.start()
+        pids = []
+        accept_callback = lambda pid, ts: pids.append(pid)
+        success_callback = Mock()
+        error_callback = Mock()
+        for i in range(3):
+            pool.apply_async(
+                lambda x: time.sleep(x),
+                (2, ),
+                {},
+                accept_callback=accept_callback,
+                correlation_id='asdf-1234-%s' % i,
+                error_callback=error_callback,
+                callback=success_callback,
+            )
+        self.assertTrue(pool.workers)
+        self.assertEqual(pids, list(pool.workers))
+
+        #self.assertEqual(semaphore.value, 0)
+        pool.terminate()
+        # TODO TODO TODO TODO TODO TODO
+        #pool.grow()
+        #self.assertFalse(success_callback.called)
+        #self.assertTrue(error_callback.called)
+
+    #def test_restart
+    #
+    #def test_timeout
+    #
+    #def test_